[ramereth]

We (Oregon State University Open Source Lab) have been working with IBM for the last few years to help with this problem. We host a set of P8 (and soon P9) machines for them so FOSS projects can work on porting issues. You're welcome to sign up if you're interested [1].

[1] http://osuosl.org/services/powerdev/

[johnmertic]

On the same note, we are providing the same for OSS projects wanting to leverage mainframe ( https://www.openmainframeproject.org/blog/2018/01/08/make-ma... ) and service that lets try a mainframe running Linux in the cloud ( https://www.openmainframeproject.org/trymainframe )